I helped my buddy pump some gas out with fuel hose but still have 20+ gallons left in tank(Ranger 1998 with Johnson 150). The sipon hose would not go all the way down the tank(useless). Can we take seat out (could not figure how to get seats up ) ? We might attempt to use a inline fuel pump to suck more gas out with use of the engine fuel hose. What else should we do so he doesn't mess up the engine and boat runs good when he starts it in the Spring ??